Which one is incorrect in the following:

(1) Inter atrial septa – thin and muscular

(2) Atrio– ventricular septa – thick and fibrous

(3) Inter ventricular septa – thick and muscular

(4) Pericardium – muscular

Subtopic:  Human Heart: Gross Anatomy |
 55%
From NCERT
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SAN is present in __________ while AVN is present in __________.

(1) Right upper corner and left lower corner of both the atria.

(2) Right upper corner and left lower corner of right atrium.

(3) Right upper corner and left lower corner of left atrium.

(4) Right upper corner and left median corner of left atrium

Subtopic:  Human Heart: Gross Anatomy |
 84%
From NCERT
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Bundle of His includes:

(1) Purkinje fibres + left AV bundle

(2) Purkinje fibres + right AV bundle

(3) Purkinje fibres + right and left AV bundle

(4) SA node + AV node + AV bundle

Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |
 76%
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Which one of the following is wrong with respect to nodal tissue.

(1) auto excitable

(2) not localized to a single chamber.

(3) equal ability to excite throughout nodal tissue.

(4) structural changes are observed throughout nodal musculature in different chambers of the heart.

Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |
 51%
From NCERT
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The duration of cardiac cycle is–

(1) 0.8 second

(2) 0.5 second

(3) 0.3 second

(4) 0.4 second

Subtopic:  Human Heart: Cardiac Cycle |
 97%
From NCERT
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The number of action potential generated by SAN:

(1) 70–75 times per minute.

(2) 50–72 times per minute.

(3) Exact 70 times per minute.

(4) not more than 60 times per minute.

Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |
 96%
From NCERT
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The route of action potential in heart is

(1) SA node – AV node – AV bundle

(2) AV node – SA node – bundle of his – AV bundle

(3) SA node – AV node – AV bundle – Bundle of His

(4) SA node – AV node – Purkinje fibres

Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |
 79%
From NCERT
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If the stroke volume of Human heart is considered 80 mL and to pump 5L of blood how many beats are required?

(1) 63

(2) 70

(3) 72

(4) 60

Subtopic:  Human Heart: Cardiac Cycle |
 59%
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The lub sound of heart is produced during which phase of cardiac cycle?

(1) ventricular systole

(2) atrial diastole

(3) joint diastole

(4) atrial systole

Subtopic:  Human Heart: Cardiac Cycle |
 67%
From NCERT
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The sequence of opening (O) and closing (C) of heart –valves are:

(1) AV valves open before the closure of SL or semilunar valves.

(2) AV valves close before the closure of SL or semilunar valves.

(3) AV valves open after the closure of SL or semilunar valves.

(4) AV valves close with closure of SL or semilunar valves.

Subtopic:  Human Heart: Cardiac Cycle |
 52%
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